20 Jan Use Map Settings is a game mode used for playing maps which support special functionalities such as triggers and observer players. Retrieved. It's been probably around 10~ years since I've played Starcraft on solidonorte.com and I always loved playing UMS over regular play / ladder. I logged. Use Map Settings is a selectable game type in StarCraft and StarCraft II in which the game will follow the scripted scenario the map was created with, if any.